Only way I can resolve no response errors when TV (OLED55E8PTA) is in standby mode is move IOS device running HomeKit app within Bluetooth range, TV is connected to network via Ethernet cable. Quick Start+ is enabled. I have a 4K Apple TV within 3 feet of the TV and a HomePod also within Bluetooth range. Once TV is on I can change inputs and turn it off via HomeKit app outside of Bluetooth range.